1)

Let X and Y the two events such  P(X)=13P(XY)=12, P(YX)=25    Then


A) P(Y)=415

B) P(XY)=12

C) P(XY)=25

D) P(XY)=15

Answer:

Option A,B

Explanation:

P(X)=13

P(XY)=P(XY)P(Y)=12

P(YX)=P(XY)P(X)=25

P(XY)=215

P(Y)=415

  P(XY)=P(Y)P(XY)P(Y)

=415215415=12

P(XY)=13+415215

   = 715=715